Phenotype
Definition
The observable serological result for a blood group system, determined by which antigens are present on the red cell surface. Two people can share the same phenotype but have different underlying genotypes, which limits the precision of phenotype-based deductions.
Related terms
- Exclusion
- The categorical conclusion that one or more examined features are clearly inconsistent in a way that cannot be explained by projection angle,...
- Exclusion probability (PE)
- The proportion of unrelated men in the relevant population who would be excluded as fathers of a child with the observed maternal...
- False exclusion
- An incorrect serological finding that excludes a true biological parent. Causes include chimerism (two cell populations in one individual), rare antigen variants,...
- Non-exclusion (inclusion)
- A finding that the alleged parent's blood group profile is compatible with parentage. Non-exclusion does not prove parentage: it means only that...
- Paternity index (PI)
- A likelihood ratio that compares the probability of the observed serological profile if the alleged father is the biological father to the...
Explained in
- Blood Group Typing in Paternity and Kinship TestingThe observable serological result for a blood group system, determined by which antigens are present on the red cell surface. Two people can share the same phe...